Valve-dressing tool.



M. B. SKINNER.

VALVE DRESSING TOOL. APPLIoATIoN ljILBD JULYQ, 100e.

1,061,694. Patented May 13, 1913 I Ja .inserted in the body ot' the valve.

MDBTIMEB 2B. SKINNER, O'F WIIJMETTE, ILLINOIS.

VALVE-RESSING TOOL.

Loenen.

Specification olf Letters Intent.

Patented May 13, i913.

Application tiled July 9, 1909. Serial No. 506,710.

'oA all lwhom t may concern Be it known-that l, Mon'rrMEn B. Siti man, acitizen ot' the United States, resid` ing in the eity ot' -Wilmette, eounty of Cook, and State of Illinois, haveiinvented certain new and useful, Improvements in Valve- Dressin Tools, ,of which the following is a speci cation.

This'invention relates to improvements in valve dressing tools, and refers more peru tieularly to tools for. dressing the seals ofV globe valves and the like.

The invention consists in the mattei-sheriff inafter described and more partieularly pointed ont in the appended claim. In the drawiugs-Figure l if; a vertical sectional View of a globe valve with the valvestern removed, and showing my iinproved dressing' tool therein; Fig. in a similar sectional view on a somewhat larger scale, but showing the tool equipped with the centering attachments; Fig. 3 is a View partly in side elevation and partly in ver tical section of the toolstoelt, parte, however, being lbroken away in order to .reduce the size of the drawing; Fig'. 'his a perspeetive view of the upper centering or guiding collar. Fig. is n similar view ot' the centering ring 4Whieh fits within the valve seat; Figs. 6 and 7 nre reepeetively end and side elevations of the cutter.

i lln valves of this Character it, is nertefsary that the valve Seats he very aecurately and uniformly dressed. 'This cannot he aeeonrplished, however, unleesl 'the dreneirtgi` tool is at all'tinles centered during the opel" ition ot' dressing.

Referring,r to the drawings 'l designates as a whole a globe valve ot well lcnown con struction having a valve eeat. il, whirh in the present inetanee tlat at ite upper )linee as Shown at il, and is provided with a her-- eled inner edge ll.

The main body of `the tool consiste of a y stock 6 which whenln use extends through I the bonnet of the valve, a shank portion i.

4which fits within the` brace, and an enlarged head or chuck i' which receives the critter. .ln using thetool the valve stem and-bonnet are first removed nud the eluielr ',l`he honnet is then replaced and screwed into peeition. n order, however, to permitot' the Same tool being used ior valves ot' vai-loue sizes, the former is provided with a .aerien et attachments. To this end .l provide the tool with a series; olE entiers l() having a plurality ot blades or hnil'e edges upon either .tare ot the cutter. Aa shown more clearly in Fig. l5 the blade on one l'uee oi the cutter are inclined as shown at ll, while the liladeaon the opposite tar-e are flat as shown at 1l. This construction permits ol" the same cutter heine' used 'for dressing either a' flat onluiveled vulve seul. While the tool is provided with a plurality olf cutters, the heads o'l' the latter are made uniform, in order to tit within the socket ll o l` the ehurk 7. 'lhe cutters nre detnohahly looked in position hy means o'l a .eet screw lll, the head of whirh ie rountereunlr as shown at l5.

ln the construction shown in Fing. l, the valve is ol suoli .eine that the lool in ao eurately guided and neutered during the opl eration ol drew-ling without` the uerwsily ot using; nny altuohnlenlfs. 'lho upper end of the stoel: tite: yenugrly-wihin the bonnet, while the lower end 111- ol the rhut'i: similarly lits within the valve Heat. ll ia apparent, how ever, that il the saine lool is nerd lor drew' iut;l a larger valve sont eurh ne shown in Fin'. '12 the utoelc will not he neutered, thus preventinp; lho proper :12er-laine; ol the Seat. '.lo overrouu this dillieully, the upper end ot' thtl etoul; in provided with n looeely mounted tapered eollar or riui;l lll which fihil chir-,ely within the upper end ot the bonnet as -hown in l"i .2 lhue serving; as a. hearingr and uruirriugfy umano l'or the upper end ot tin` vloeit. rthe loper ol" the rinpj ohvionfaly permite-ol1 thesuxnu riup; lit-inn uned Vl'or hoir non: ol' tliliiri-nt. einen, ln order to preveiit the rhin; or collar l'roxu elippinp; into the bonnet, the l'orlner is-s prelrrahl-i, uro ided nl'. itey u )per :rnd with u lluniige lii, l v the :mnupurposse lla.l vliuelt iu provid il with a plurality nl eeulerinji rino` ur :verliet ineluluru 1T .@lotlwl u lll to lil over the eullrr ll), 'this rrntering ringe; univ he lorlted in position by means oi a reel rrtuv Elli. 'lnusnuu-,h un the tool is proviilml with a Series oi" lhene Hochet. inem here ol van-vuil:l eine, it is apparent that the chui-l.' muy he accurately centered hy siniply iunerlinp; upon the lower end o the latter a eenleriiuy; nuunher corresponding to the eine ot'` the valve seat. The ieper et the upper ring,r or collar permi' of this atlndunopt being used lor u, "alve oil" any given eine av: :at: led.

ilfhile l. have herein :shown a preferred einlunlirneul; ot uiy invention, it ej apparent l either uien im .whovvn at 19,

that it is not limite to the details of con- In a valve dressmg tool, the conloinationl with' a, stock, of 2t cylindrical chuck membei' threaded to the lower end of said etnok, saidchuck member having a diametral slot in its owe end, a tool rigidly secured in said slot, a; cyiindical centering cap for 'fitting over vthe lower' emi of said chuck member and having opposite slots faire cevng the endsV of the tool projecting from the chuck member, said chuck member han# mg a perlphem; grcove and a set scewfcr engaging 1n said groovezto hold said centcrlng sleeve to sind chuck member.

MQRTEMER B. SKNNER.

Witnesses i 1 ANNA BRIEN, .FRANK L. BELKNM. 

